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What is zkSync?

zkSync is a Layer 2 scaling protocol for Ethereum built by Matter Labs, a development studio founded in 2018 by Alex Gluchowski and Alex Vlasov. The network uses zero-knowledge rollup (zk-rollup) technology to bundle thousands of transactions off-chain and submit a single cryptographic validity proof back to Ethereum mainnet, inheriting Ethereum's security while drastically reducing fees and latency.

The original zkSync 1.0 (now called zkSync Lite) launched on mainnet in June 2020 as a payments-focused rollup, and its successor zkSync Era — a general-purpose, EVM-compatible zkEVM — went live on March 24, 2023, opening the door to full smart contract deployment. Matter Labs has raised more than $450 million across funding rounds led by investors including a16z, Blockchain Capital, Dragonfly, and Placeholder, making it one of the best-capitalized rollup teams in the industry.

The ecosystem has grown to host hundreds of dApps spanning DeFi protocols like SyncSwap, Maverick, Izumi, and Woofi, as well as perpetual exchanges, NFT platforms, and on-chain games. In 2024 Matter Labs unveiled the ZK Stack, a modular open-source framework that lets developers launch their own sovereign zk-powered chains (called 'hyperchains' or ZK Chains) that share liquidity and messaging with zkSync Era.

High-profile projects such as GRVT, Cronos zkEVM, Lens Network, and Sophon have committed to launching on the ZK Stack, positioning zkSync as a multi-chain elastic cluster rather than a single rollup. The ZK token launched on June 17, 2024 through one of the largest airdrops in Layer 2 history, distributing 17.5% of the total supply (around 3.675 billion tokens) to roughly 695,000 eligible wallets.

The launch was not without controversy: community members and Sybil hunters criticized the eligibility criteria, arguing that many genuine users were excluded while automated farming addresses still qualified, sparking a wider industry debate about fair airdrop design. Matter Labs also faced scrutiny in 2022 over the 'Zcash' trademark dispute with the Electric Coin Company around the 'zk' prefix, which was eventually resolved amicably.

Governance of the protocol is being progressively handed to a three-body structure comprising the Token Assembly, Security Council, and Guardians, with ZK token holders voting on protocol upgrades, treasury allocations, and elastic chain parameters. Despite fierce competition from Arbitrum, Optimism, Base, Starknet, and Linea, zkSync Era has consistently ranked among the top Ethereum rollups by total value locked and daily transactions, and it remains a flagship project for the zero-knowledge narrative.

The network's native gas token for transactions is still ETH (users pay fees in ETH on zkSync Era), while the ZK token's primary roles are governance and paying for data availability in the elastic chain ecosystem. With ongoing upgrades to proof generation speed, boojum prover integration, and the rollout of interoperable ZK Chains, zkSync continues to push the boundaries of what zero-knowledge cryptography can deliver at scale for Ethereum users and developers.

Key Features of zkSync

• ZK-Rollup Architecture: zkSync Era uses zero-knowledge validity proofs to cryptographically guarantee the correctness of every state transition before it settles on Ethereum. Unlike optimistic rollups, there is no 7-day withdrawal challenge period, enabling faster and mathematically secure finality back to L1.
• Ultra-Low Transaction Fees: By compressing transaction data and posting only succinct proofs to Ethereum, zkSync typically reduces gas costs by 20x to 100x compared to mainnet. Simple transfers and swaps often cost just a few cents, making micro-transactions and everyday crypto use economically viable.
• EVM-Compatible zkEVM: zkSync Era supports Solidity and Vyper smart contracts with near-identical developer tooling to Ethereum, allowing dApps to migrate with minimal code changes. Its custom compiler (zksolc) optimizes bytecode for zero-knowledge proving while preserving standard EVM semantics.
• Native Account Abstraction: zkSync is the first major L2 to ship native account abstraction (AA) at the protocol level, rather than as an ERC-4337 add-on. This unlocks features like paying gas in any token, social recovery wallets, session keys for gaming, and multisig accounts without deploying complex contract wallets.
• ZK Stack Hyperchains: Developers can spin up sovereign zk-powered chains using the open-source ZK Stack, customizing data availability, gas tokens, and sequencers while staying interoperable with zkSync Era. These elastic chains share liquidity and proofs, forming a unified multi-chain ecosystem under one ZK token.

zkSync Use Cases

• Low-Cost DeFi Trading: DEXs like SyncSwap, Maverick, and Izumi leverage zkSync's cheap transactions to offer concentrated liquidity trading, yield farming, and lending without the prohibitive fees of Ethereum mainnet. Traders can execute complex multi-hop swaps for cents rather than dollars.
• On-Chain Perpetuals and Derivatives: Perpetual exchanges such as GRVT are building dedicated ZK Chains on the ZK Stack to achieve CEX-level performance with on-chain settlement. Fast finality and low fees make high-frequency leveraged trading feasible directly on Layer 2.
• Web3 Gaming and NFTs: Games and NFT projects use zkSync to mint, trade, and transfer assets at negligible cost, enabling in-game economies where every item and action is on-chain. Native account abstraction also powers seamless onboarding with email logins and gasless transactions sponsored by game studios.
• Consumer Payments and Remittances: Stablecoin transfers on zkSync settle in seconds for fractions of a cent, making it suitable for cross-border remittances, payroll, and merchant payments. Account abstraction allows users to pay fees in USDC or other tokens without holding ETH.
• Social and Identity Applications: Projects like Lens Network are building decentralized social graphs on ZK Chains, where every post, follow, and tip is recorded cheaply on-chain. Zero-knowledge cryptography also enables privacy-preserving identity and proof-of-personhood use cases at scale.

zkSync Tokenomics

Total Supply

The ZK token has a fixed maximum supply of 21,000,000,000 (21 billion) tokens, established at the June 2024 token generation event. No additional minting beyond the scheduled emissions is planned at the protocol level.

Circulating

At launch roughly 3.675 billion ZK (17.5% of supply) was airdropped, with additional tranches allocated to ecosystem programs, investors, and the team subject to multi-year vesting cliffs and linear unlocks.

Utility

ZK is primarily a governance token, giving holders voting rights in the Token Assembly over protocol upgrades, treasury spending, and elastic chain parameters. It is also used to pay for data availability and other network services across ZK Chains, though ETH remains the gas token on zkSync Era itself.

Emission

Allocations include 66.7% to the community (airdrops, ecosystem fund, onchain governance) and 33.3% to investors and Matter Labs contributors, with team and investor tokens locked for one year post-TGE followed by a three-year linear vesting schedule. Ecosystem emissions are released gradually through governance-approved programs.

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